Poor Man's Scaling and Green Function Analysis of the Kondo Anomaly in Single-Level Quantum Dots

• Authors: M. Wawrzyniak , R. Świrkowicz , M. Wilczyński , J. Barnaś
• Languages of publication: EN

Abstracts

EN

Kondo effect in a single-level quantum dot attached to magnetic leads is studied theoretically by the "poor man's scaling" and non-equilibrium Green function methods. From the scaling equations we derive the Kondo temperature as a function of the model parameters - in particular as a function of the angle between magnetic moments. Transport characteristics, i.e. differential conductance and tunnel magnetoresistance associated with magnetization rotation, were calculated within the non-equilibrium Green function formalism based on the equation of motion method.

Keywords

EN

75.20.Hr; 72.15.Qm; 72.25.-b; 73.23.Hk

Discipline

• 72.15.Qm: Scattering mechanisms and Kondo effect(see also 75.20.Hr Local moments in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions in magnetic properties and materials)
• 72.25.-b: Spin polarized transport(for spin polarized transport devices, see 85.75.-d)
• 73.23.Hk: Coulomb blockade; single-electron tunneling
• 75.20.Hr: Local moment in compounds and alloys; Kondo effect, valence fluctuations, heavy fermions(for Kondo effect and scattering mechanisms in electronic conduction, see 72.15.Qm and 72.10.Fk)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 1
• Pages: 553-556

Dates

published

2008-01

received

2007-07-09

Contributors

author

M. Wawrzyniak

• Department of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

R. Świrkowicz

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

M. Wilczyński

• Faculty of Physics, Warsaw University of Technology, Koszykowa 75, 00-662 Warsaw, Poland

author

J. Barnaś

• Department of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland
• Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland

References

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• 6. R.Świrkowicz, M. Wilczyński, M. Waewrzyniak, J. Barnaś, Phys. Rev. B 73, 193312 (2006)
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• 10. J.R. Schrieffer, P.A. Wolff, Phys. Rev. 149, 491 (1966)

Identifiers

DOI

10.12693/APhysPolA.113.553